Shandong Rongfu new material technology Co,Ltd

700-800mm UHP graphite electrode,UHP Graphite Electrodes,Oxidation Resistance Graphite Electrode,UHP Graphite Electrodes Manufacturer
UHP Graphite Electrodes
Oxidation Resistance Graphite Electrode
UHP Graphite Electrodes Manufacturer
Electric resistivity : 4.5-5.8
Bending strength: >=10.0
Elastic Modulus: <=14
Bulk density:1.68-1.74
Ash:   <=0.3
CTE:  1.10-1.50
Ultra high power graphite electrode is a graphite electrode with allowable current density greater than 25A/cm2 . UHP graphite electrode mainly used in ultra-high power steelmaking electric arc furnace.
Physical and Chemical Index of Ultra high Power  Graphite Electrode
Item  Unit UHP
300～500 550～600 700～800
Electric Resistivity  Electrode uΩ.m 4.6～6.2 4.5～6.0 4.5～5.8
Nipple 3.5～5.0 3.4～4.5 3.3～4.3
Bending Strength Electrode MPa ≥10.5 ≥10.0 ≥10.0
Nipple ≥20.0 ≥22.0 ≥23.0
Modulus of Elasticity Electrode GPa ≤14.0 ≤14.0 ≤14.0
Nipple ≤20.0 ≤22.0 ≤22.0
Bulk Density Electrode G/cm3 1.66～1.73 1.68～1.74
Nipple 1.75～1.82 1.78～1.85
Ash Content Electrode % ≤0.3
Nipple
The Coefficient of Thermal Expansion(CTE) Electrode 10-6/℃ 1.20～1.50 1.10～1.50
Nipple 1.10～1.40 1.00～1.30

UHP Graphite Electrode Current Carrying Capacity
Norminal Diameter UHP
Current Carrying Capacity Current Density
inch mm A A/cm2
12 300 15000～22000 20～30
14 350 20000～30000 20～30
16 400 25000～40000 19～30
18 450 32000～45000 19～27
20 500 38000～55000 18～27
22 550 45000～65000 18～27
24 600 50000～75000 18～26
28 700 70000～120000 18～25
32 800 ／ ／

Tolerance of Graphite Electrode Diameter and Length（mm) 
Nominal Diameter Actural diameter Length
in mm max min Black surface min
12 300 307 302 299 1800/2000
14 350 358 352 349 1800/2000/2200
16 400 409 403 400 1800/2000/2200
18 450 460 454 451 1800/2000/2200
20 500 511 505 502 2000/2200/2400
22 550 562 556 553 2000/2200/2400/2700
24 600 613 607 604 2200/2400/2700/3000
28 700 714 710 707 2200/2400/2700/3000
29 800 816 812 809 2200/2400/2700/3000

Permissible Deviation of Graphite Electrode Length (mm)
Nominal Length Standard Deviation Short Length Deviation
max min max min
1800 +100 -100 -100 -275
2000 +100 -100 -100 -275
2200 +100 -100 -100 -275
2400 +100 -100 -100 -275
2700 +200 -150 -150 -275
3000 +200 -150 -150 -300